The treatments of antiquing and burnishing accelerate the formation of a natural patina on the surface, which is typical of alloys that contain copper.
The presence of such patina on the surface of the profile is the best and most durable protection, thus ensuring durability over the years.
The appearence and the chromatic tone of the surface where the patina has formed can vary according to many factors: weathering, geographic position and climatic conditions of the site.